aio_fill_buffer
aio_fill_buffer(buffer[1], buffer_size, random());
aio_fill_buffer(buffer[1], buffer_size * 3, random());
aio_fill_buffer(ac->ac_buffer, buflen, ac->ac_seed);
aio_fill_buffer(buffers[i].buffer, sb.st_blksize, random());
aio_fill_buffer(buffer, buflen, seed);
aio_fill_buffer(buffer, buflen, seed);